What Is GHK-Cu?
GHK-Cu (glycyl-L-histidyl-L-lysine copper complex) is a naturally occurring tripeptide that binds copper ions. First identified in human plasma in the early 1970s by Dr Loren Pickart, it has since become one of the most extensively studied peptides in the fields of skin biology, wound healing, and longevity research.
GHK plasma concentrations naturally decline with age — from approximately 200 ng/mL in young adults to around 80 ng/mL by age 60 — making it a subject of significant interest for researchers studying the biology of ageing and tissue regeneration.
Disclaimer: GHK-Cu is supplied by Meytrix Therapeutics strictly for laboratory and research purposes. It is not approved for human use. This content is educational and does not constitute medical advice.
Molecular Structure and Copper Binding
The GHK tripeptide consists of three amino acids: glycine (G), histidine (H), and lysine (K). The "-Cu" suffix refers to its copper(II) ion complex. The copper-binding capacity of this peptide is central to many of its observed biological activities in research settings, as copper is an essential cofactor in numerous enzymatic processes including collagen cross-linking and antioxidant defence.
Key Research Areas
Skin Repair and Collagen Synthesis
GHK-Cu is perhaps best studied in the context of skin biology. Research has demonstrated its involvement in:
- Stimulation of collagen, elastin, and glycosaminoglycan synthesis in fibroblast cell cultures
- Upregulation of matrix metalloproteinases (MMPs) and their inhibitors (TIMPs), which together regulate extracellular matrix remodelling
- Promotion of wound contraction and re-epithelialisation in animal models
- Reduction of oxidative damage markers in UV-exposed skin tissue models
Gene Expression Modulation
One of the more remarkable aspects of GHK-Cu research is its apparent capacity for broad gene expression modulation. Bioinformatics analyses of gene array data have associated GHK exposure with changes in expression patterns linked to inflammation, DNA repair, and mitochondrial function — areas directly relevant to cellular ageing and tissue homeostasis research.
Antioxidant and Anti-Inflammatory Activity
In vitro studies have demonstrated GHK-Cu’s ability to suppress pro-inflammatory cytokines including TNF-α and IL-6, while also demonstrating superoxide dismutase (SOD)-like antioxidant activity mediated through the copper complex. These properties make it of interest to researchers studying oxidative stress pathways.
Hair Follicle Research
GHK-Cu has been investigated in the context of hair follicle biology, with in vitro and animal studies exploring its effect on follicle size, dermal papilla cell proliferation, and anagen phase duration.
Stability and Storage Considerations for Researchers
Copper peptides present some specific handling considerations compared to other research peptides:
- Oxidation sensitivity: GHK-Cu can be susceptible to oxidation, which may alter its copper-binding capacity. Minimise exposure to air and store in sealed vials.
- Light sensitivity: Store away from direct light; blue-tinted or amber glass vials are preferable.
- pH considerations: Stability is best maintained at slightly acidic to neutral pH. Consult your reconstitution protocol accordingly.
- Temperature: Store lyophilised powder at −20°C for long-term preservation; once reconstituted, refrigerate at 2–8°C and use within 4 weeks.
For general peptide handling guidance, see our Peptide Storage & Handling Guide.
GHK-Cu in Longevity Research
Beyond skin biology, GHK-Cu is attracting attention in the broader longevity research space. Its influence on pathways associated with cellular senescence, DNA repair upregulation, and mitochondrial gene expression positions it as a compound of interest in ageing biology. Researchers exploring senolytics, NAD+ metabolism, and tissue rejuvenation protocols may find GHK-Cu a relevant tool compound to include in comparative studies.
Source Research-Grade GHK-Cu
Meytrix Therapeutics supplies high-purity GHK-Cu for laboratory research use. Our compound is supplied in lyophilised form with purity specification data.
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